# Anthropic — Introducing Claude Opus 5.5

- Company: Anthropic (anthropic.com)
- Announced: 2026-09-22
- Category: model-update
- Coverage: 23 outlets
- Announcement: yes
- Group: models
- Source: https://www.anthropic.com/claude-opus-5-5
- Record: https://forck.live/items/13091-introducing-claude-opus-5-5
- Subject: Claude
- Models affected: Claude Opus 5.5
- Pricing: Input and output tokens are $4 and $20 per million, 20% less than Opus 5. Cache reads are $0.20 per million tokens, 60% less than Opus 5. Fast mode costs $8 per million input tokens and $40 per million output tokens.

Anthropic released Claude Opus 5.5, a new model that performs at the level of Claude Fable 5.1 on most work while costing 40% less to run than Opus 5. The model achieves the best scores on Anthropic's automated behavioral audit and generates output more than 30% faster than Opus 5. Claude Sonnet 5.5 and Claude Haiku 5.5 will follow in the coming weeks.

## Evidence

Verbatim from https://www.anthropic.com/claude-opus-5-5:

> It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5. Opus 5.5 achieves the best scores of any model to date on our automated behavioral audit, our alignment suite that tests Claude across thousands of simulated scenarios.

## Around this story

Outlets this record can name and link:

- Reuters: https://reuters.com/business/anthropic-unveils-claude-opus-55-2026-09-22
- Quartz: https://qz.com/anthropic-claude-opus-55-cost-performance-092226
- Mashable — Anthropic launches Claude Opus 5.5: Benchmarks, pricing, safety: https://mashable.com/tech/claude-opus-launch-promises-better-performance-cheaper-price
- 9to5Mac — Anthropic upgrades Claude with new Opus 5.5 model, details here: https://9to5mac.com/2026/09/22/anthropic-upgrades-claude-with-new-opus-5-5-model-details-here
- MacRumors — Anthropic Launches Claude Opus 5.5 With Fable-Level Performance at a Lower Price: https://macrumors.com/2026/09/22/anthropic-claude-opus-5-5
- Wccftech: https://wccftech.com/anthropics-claude-opus-5-5-appears-in-claude-code-indicating-imminent-release-as-trump-renames-ai-to-super-intelligence-or-si
- RuntimeWire — Anthropic launches Claude Opus 5.5 with lower prices and a top-three benchmark score: https://runtimewire.com/article/anthropic-launches-claude-opus-5-5-with-lower-prices-and-a-top-three-benchmark-s
- RuntimeWire — Ryan Sael builds an interactive lens lab with Opus 5.5 for a claimed $25.66: https://runtimewire.com/article/ryan-sael-opus-5-5-interactive-camera-lens-lab
- PYMNTS — Anthropic Cuts AI Processing Costs 40% With Opus 5.5 Debut: https://pymnts.com/news/artificial-intelligence/2026/anthropic-cuts-ai-processing-costs-40-with-opus-5-5-debut
- Neowin: https://neowin.net/news/anthropics-new-claude-opus-55-model-is-almost-like-fable-51-but-much-cheaper
- Yahoo Finance — Anthropic launches Opus 5.5, its first model since CEO Amodei called for AI slowdown: https://finance.yahoo.com/technology/article/anthropic-launches-opus-55-its-first-model-since-ceo-amodei-called-for-ai-slowdown-163000869.html
- Pulse 2.0 — Anthropic Launches Claude Opus 5.5 With 40% Lower Costs And Over 30% Faster Output: https://pulse2.com/anthropic-launches-claude-opus-5-5
- Decrypt — Anthropic’s New Claude Opus 5.5 Matches Fable at 60% the Price: https://decrypt.co/378947/anthropic-claude-opus-5-5-fable-price-comparison
- Ithinkdiff — Claude Opus 5.5 Launches With a 40 Percent Price Cut: https://ithinkdiff.com/claude-opus-5-5-launches-with-a-40-percent-price-cut-and-major-coding-gains
- Thurrott — Anthropic Releases Claude Opus 5.5: https://thurrott.com/a-i/anthropic/341913/anthropic-releases-claude-opus-5-5
- iClarified — Anthropic Launches Claude Opus 5.5 With Lower Prices and Faster Output: https://iclarified.com/102348/anthropic-launches-claude-opus-55-with-lower-prices-and-faster-output
- XDA Developers — Anthropic releases Claude Opus 5.5, and it's not just more powerful: it's cheaper, too: https://xda-developers.com/anthropic-releases-claude-opus-55-and-its-not-just-more-powerful-its-cheaper-too
- Constellation Research — Anthropic launches Claude Opus 5.5, gets cost, efficiency memo: https://constellationr.com/insights/news/anthropic-launches-claude-opus-55-gets-cost-efficiency-memo
- Help Net Security — Claude Opus 5.5 cuts costs and adds safeguards for autonomous AI: https://helpnetsecurity.com/2026/09/23/anthropic-claude-opus-5-5
- Theglobeandmail — Anthropic unveils cheaper AI model Claude Opus 5.5: https://theglobeandmail.com/business/article-anthropic-ai-claude-opus-55-amodei
- Itechpost — Anthropic and OpenAI Shake Up AI With More Powerful, Cheaper Models and Opus 5.5 Price Cuts: https://itechpost.com/articles/237403/20260923/anthropic-openai-shake-ai-more-powerful-cheaper-models-opus-55-price-cuts.htm
- METR — Summary of METR's predeployment evaluation of Claude Opus 5.5: https://metr.org/blog/2026-09-22-claude-opus-5-5

## Follow-ups

- 新智元 (reported, 20 Sep): 突发！Claude Opus 5.2（Opus-Next）疑似全端灰测回归 — https://forck.live/items/12345-claude-opus-5-2-opus-next

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